Is the device (PLC) that you are trying to
communicate with connected to the power supply?
Is the PC resp. the PLC connected to the network?
Is the TCP/IP protocol installed?
Are the used datablocks correctly defined in the PLC?
Have you analyzed the diagnosis viewer entries (which errors have
occured)?
Are all participants in the same subnet?
Have you transmitted the driver configuration file to the target
computer?
Have you analyzed the "driver communication error file" (which
errors have occured)?
Show
all 
Hide
all